Cargo bicycle frame



FIG. 1 is a right view of a cargo bicycle frame, showing the new design;

FIG. 2 is a left view thereof.

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a back view thereof. 

CLAIM The ornamental design for a cargo bicycle frame, as shown and described. 